Truck step



FIG. 1 is a left perspective of the truck step;

FIG. 2 is a top view of the truck step;

FIG. 3 is a front view of the truck step;

FIG. 4 is a back view of the truck step;

FIG. 5 is a bottom view of the truck step;

FIG. 6 is a left side view of the truck step; and,

FIG. 7 is a right side view of the truck step. 

I claim the ornamental design for a truck step, as shown and described. 